They also say more sophisticated poaching methods are being used, with organised criminal gangs flying in to game reserves by helicopter to kill rhinos, hack off their horns and make a quick getaway.

他们还表示，有组织的犯罪团伙正在使用更为先进的偷猎方法——这些偷猎者坐着直升机飞到各禁猎区捕杀犀牛，砍下犀角，并迅速逃走。